毛主席和我说做人要低调
[máo zhŭ xí hé wŏ shuō zuò rén yào dī diào]
'Chairman Mao told me to be humble'. It humorously means that Chairman Mao Zedong, a great leader in Chinese history, taught the owner of the nickname to be modest and low-key, suggesting a sense of national pride or self-mockery on personality shaping from historical figures.